Mask



FIG. 1 is a rear perspective view of a mask in a folded state, showingthe new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a front elevation view;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a side perspective view of a mask in an unfolded state.

The broken lines in the drawings depict portions of the mask that formno part of the claimed design.

CLAIM The ornamental design for mask, as shown and described.